倾斜限制空间内池式沸腾临界热流密度试验研究

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Experimental Study on Pool Boiling Critical Heat Flux in Inclined Confined Spaces

1. School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai, 200240, China;
2. China Nuclear Power Technology Research Institute, Shenzhen, Guangdong, 518026, China

摘要: 在大气压下近饱和去离子水中,表面倾角(θ)从0°变化到30°、窄缝尺寸(e)从3 mm变化到8mm,开展限制空间内池式沸腾临界热流密度(CHF)试验。研究表明:CHF值(q_CHF)随θ的降低而减小;随e的增加而增大。q_CHF变化存在明显的过渡角,当表面倾角大于过渡角时,CHF随窄缝尺寸的变化速率趋缓;当表面倾角小于过渡角时,CHF随窄缝尺寸的变化速率加快。研究还发现过渡角随窄缝尺寸的增加而增大,3、5和8 mm窄缝的过渡角分别为10°、15°和20°。
- 限制空间 /
- 池式沸腾 /
- 临界热流密度 /
- 表面倾角
Abstract: CHF experiments in confined spaces are performed for near-saturated demineralized water at atmospheric pressure with gap sizes of 3 mm,5 mm and 8 mm,and inclination angles of 0°,5°,10°,15°,20°,and 30°.Analysis of CHF data showes that CHF decreases as the inclination angle changes from 30° to full downward facing position（0°） and increases as the gap size varies from 3 mm to 8 mm.In the present study,certain transition angles are also identified for different gap sizes.For the gap sizes of 3 mm,5 mm and 8 mm,the transition angles are found to be 10°,15° and 20°,respectively.
- Confined spaces /
- Pooling boiling /
- Critical heat flux /
- Inclination angle